a Calculated by subtracting state and federal taxes from service station price (including taxes).
b State and federal taxes are weighted averages computed by the American Petroleum Institute, based on gasoline sold in the 50 states.

KEY: NA = not applicable

SOURCES:Retail price of regular grade gasoline except service station prices (including taxes): American Petroleum Institute, Basic Petroleum Data Book (Washington, DC: Annual issues), section VI, table 5, and similar tables in earlier editions.
Service station price (including taxes): U.S. Department of Energy, Energy Information Administration, Annual Energy Review 1998, DOA/EIA-0384(97) (Washington, DC: July 1999), table 5.22. Also available at Internet site http://www.eia.doe.gov/pub/energy.overview/aer98/txt/aer0522.txtConsumer price indices: Council of Economic Advisors, Economic Report of the President (Washington, DC: February 1999), tables B-60 and B-61. Also available at Internet site http://w3.access.gpo.gov/eop/